Referral buttons

By adding a referral button to your site, you
can direct users to products like AdSense,
AdWords, and Firefox with Google Toolbar.
Our policies allow you to place one referral
button per product, for up to four products
total, on any given page.

Page eCPM
Cost per 1000 impressions. From a publisher's
perspective, CPM is a useful way to compare
revenue across different channels and advertising
programs. It is calculated by dividing total earnings
by the number of impressions in thousands. For
example, if a publisher earned $180 from 45,000
impressions, the CPM would equal $180/45, or $4.00.
However, please keep in mind that eCPM is a
reporting feature that does not represent the actual
amount paid to a publisher.